(Reuters) -Hawaii's Gabriela Bryan defended her Western Australia Margaret River Pro title on Tuesday, showcasing her powerful forehand surfing to beat reigning world champion Caitlin Simmers and maintain her rankings lead over her Californian rival.

South African Jordy Smith won the men's event, stop seven on the world tour, by taking out California's Griffin Colapinto. The 37-year-old now leads the world championship rankings 18 years after making his tour debut.

While conditions had slowed on Tuesday after big, perfect surf earlier in the competition period, Simmers and Bryan started their final swiftly.